maybe like the hold button or wifi button or something like that
But i dont want it to be sound reactive
ok, here is a simple plan for making a led mod for a psp slim.
this is how you wire the wifi swich, (nico's pic)
And here's where you should solder the 5V wire, (nico's pic)
if you need anymore help, just ask.
Also check out Lordnic0's tut, it maybe for a sound reactive mod, but it give you great ideas for where to place ther wires. (well it's a great tut all round really).